Gebler Company sells a product for $85 per unit. Variable costs are $65 per unit, and fixed costs are $800 per month. The company expects to sell 540 units in September. Calculate the contribution margin per unit, in total, and as a ratio. . Calculate the contribution margin per unit. Select the formula labels and then enter the amounts to compute the contribution margin per unit. Contribution margin per unit Calculate the total contribution margin. Select the formula labels and then enter the amounts to compute the contribution margin. Contribution margin Calculate the contribution margin ratio. Select the formula labels and then enter the amounts to compute the contribution margin ratio. (Round your answer to the nearest percent, X%.) Contribution margin ratio %